Voltage compensation apparatus, inverter apparatus, and photovoltaic power generation system

An inverter apparatus, wherein the inverter apparatus comprises an inverter and a voltage compensation apparatus;

• the inverter comprises a housing, a power input terminal, a power output terminal, an inverter unit, and a grid-connected switch unit;
• the power input terminal and the power output terminal are disposed on the housing, the power input terminal is configured to be coupled and connected to a power output terminal of a photovoltaic panel string, and the power output terminal is configured to be coupled and connected to a power grid;
• all of the inverter unit, the grid-connected switch unit, and the voltage compensation apparatus are disposed in the inverter;
• a power input terminal of the inverter unit is coupled and connected to the power input terminal;
• a power output terminal of the inverter unit is coupled and connected to the power output terminal by using the grid-connected switch unit;
• a power input terminal of the voltage compensation apparatus is coupled and connected to a loop between the grid-connected switch unit and the power output terminal;
• and
• one pole of a power output terminal of the voltage compensation apparatus is coupled and connected to a power output terminal coupled and connected to an N wire in the power grid, and/or is coupled and connected to a coupling loop that is in the inverter and that corresponds to the power output terminal coupled and connected to the N wire in the power grid, and the other pole of the power output terminal of the voltage compensation apparatus is coupled and connected to the power input terminal of the inverter, the power input terminal of the inverter unit in the inverter, and/or a loop between the power input terminal and the power input terminal of the inverter unit.